This page updated April 14th, 2020.
For the rules pertaining to; ADUs, JADUs, granny flats, backyard homes, pool houses, cottage homes, carriage homes, pool houses and in-law suites it all boils down to the laws governing the offical definition of an accessory dwelling unit laws.
For the most up-to-date and detailed explanation of the California ADU laws we recommend the resources on this page. We use this resource ourselves at TRUPLANS INC. Here's why:
We have found that the legislation governing accessory dwelling units is widely misinterpreted not only by homeowners and contractors, but by the local building departments that attempt to codify the changing regulations. There is some level of complexity and each city has some latitude over planning and zoning.
Every City Trips Up At Least Once
From our experience every city planning and building department pass on incorrect information when we are reviewing plans with them for an accessory dwelling unit. We do a lot of listening to hear how each city has codified the ADU rules. However, we also do a lot of double takes these days, having to go back to the city to question their understanding and what they said to us. We've pulled building permits in well over 85 cities now for all types of projects and all sized projects. Even with traditional room additions every city trips up at least once with something significant and gives out completely inaccurate information. Whether it has to do with setback requirements, floor area ratios, flood zone designations, height restrictions, attached and detached requirements, the list goes on.
Checking the Plan Checker
For the reasons mentioned above, our team has developed an extensive process to check and recheck what the planning and zoning technicians are saying to us. We have our own plan checker on staff before we ever take a set of plans to the city for review. You can hire TRUPLANS INC to make your ADU plans and get your permits.
...every city trips up at least once with something significant and gives out completely inaccurate information.
Be at ease...TRUPLANS INC can handle the whole process and cut through the noise.
The California Department of Housing and Community Development is our primary resource for understanding the new California ADU laws.
For more information about California ADU Legislation go to:
CALIFORNIA DEPARTMENT OF HOUSING AND COMMUNITY DEVELOPMENT
Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs).
ADU RESOURCE BY CITY
ADDING NEW CITY ADU PAGES WEEKLY
NOTICE: by selecting these links you will be leaving TRUPLANS.NET domain
City of Fountain Valley ADU Code
City of Fullerton ADU Code
City of Garden Grove ADU Resource
City of Santa Ana ADU code
City of Tustin ADU Code